G57 - Pharmaceutical PSA Pattern, different diameters

This reticle was designed for the pharmaceutical industry. However, it is also useful where particle size considerations are restricted to 10μ and 25μ. Dots and circles give quick references for these two sizes. In addition a scale is incorporated.

This reticle is normaly used with a 10x objective: calibration factor of 1. If a different objective magnification is used then a calibration factor will be needed to allow us to make it to the correct size.

The microscope must be calibrated when ordering this reticle, such that the circle must equate to 1mm on the  microscope stage. S8 and PS8 are recommended stage  micrometers for use with this reticle. The PS8 comes with an engraved serial number as official reference and is available with certificates.

Reference: The United States Pharmaceutical Conventions Inc. Pharmaceutical Forum Vol.19 No.6.